Improvement in stump-extractors



UNITED STATES PATENT OFFICE.

D. F. LUSE AND A. P. LUSE, OF SPRING MILLS, PENNSYLVANIA.

IMPROVEM ENT IN STU MP-EXTRACTO RS.

Spceic'ation forming part of Letters Patent No. 35,827, dated July 8,1862.

To all whom it may concern:

Be it known that we, D. F. LUsE and A. P. LUsE, of Spring Mills, in thecounty of Centre and State of Pennsylvania, have invented certain newand useful Improvements in Stump- Extractors; and we do hereby declarethat the following is a description of the same in terms which we nowthink sufiiciently full, clear, and exact, .reference being had to theannexed drawings,v making a part ot' this specification, n which Figure1 is a side elevation, and Fig. 2 an end elevation.

The nature of our. invention consists in so attaching the lever to theelevatingracks that each rack shall act alternately as the fulcrum of.said lever, while both are allowed a certain degree of deviation from avertical line to accommodate them to the varying line of draft.

It also consists in the peculiar construction and operation ot' thepawls or dogs.

To enable others skilled in the art to make and use our invention, wewill proceed to describe its construction and operation.

The block A, rounded on its under side, as seen at b, is supported bythe plates B B of the frame-work C, which are scored tor a bed for thesaid block, as represented at a. The uprights of this frame are bracedby the bars c c', which'are hinged so as to admit of removal, for theadmission of the stump within the frame, when it is dragged over it bythe team attached to the staples d or d inthe runner-formed sills D D.llhe block A is mortised through vertically at its center and betweenthe plates B B', the said mortise being beveled outwardly anddownwardly, as represented by the dotted lines e e. A metallic plate, E,provided with two rectangular openings, covers this mortise, and withinthe mor tise and rectangular openings are received the racks F F',provided with holes` g, instead of the usual teeth. To the lower ends ofthese racks is suspended the double-acting lever G by means ofthe yokeH, the said racksV being pivoted or hinged to the said yoke, as seen ath h', and the clevis f, to which the chain I is attached, pivotedbetween them at the exact center of the lever G. The pawls or dogsengaging with the racks F F are constructed as follows: A segment of acircle, i, provided with a series of holes, rises from a forked piece,j, which is pivoted or hinged to the ears c lo. This segment at thecrotch of the fork rests upon the pint, which slides between the ears 7cle' and the pins mm. A rod, n, con nects the segment z' with the pin andcommunicatesto it a longitudinal motion lengthwise of the block A. Thepawl or dog on the left of the rack F is constructed in the same manner,and need not be further described.

The operation of our machine is follows: The chain I being fixed to thestump, one operator takes hold of or the team is attached to the rope J,when that end of the lever G is depressed, the rack F acting as theiulcrum, and the rack F' gradually elevated. At the same time the innerend ot the pin Z and segment i are elevated and the former graduallywithdrawn from its hole g untilit drops down upon the block, where theweight of the segmenti forces it into the next succeeding hole, wherethe rack F' is held and acts as the t'nlcrum in its turn during thedepression ofthe opposite end of the lever G. The leverage exerted uponthe pin Z may be modified by changing the rod n from hole to hole in thesegment i. When it is desired to release the racks F F', they may beslightly elevated by the lever G, which will allow ofthe easy-withdrawalof the pin Z by means of the cord K.

By means of the rounded block A and beveled mortises c e the racks FF'are permitted to swing either to the right or left, or hither orthither, whereby the said racks may al ways be kept in a direct linewith the line of draft, however much that may vary.

Having thus described'our invention and pointed out the manner in whichit operates, what we claim therein as new, and desire to secure byLetters Patent, is

l. The combination ot' the lever G with the racks F F', when each of thesaid racks acts alternately as the l`ulcrum of the said lever and whenboth are allowed to change their line ot' draft by means ot' [he roundedblock A and beveled mortises c e, substantially as described.

2T Ihe combination of the segment z', pin Z, and rod n, as and for thepurpose specified.

D. F. LUSE. A. P. LUSE.

Witnesses: ROBERT J. SMITH, ABsALoM MUssEa

